
#container{
    width: 100%;
    height: 100%;
}

.top{
    width: 100%;
    height: 70px;
    background-color: white;
    box-shadow: 5px 5px 10px gainsboro;
    border: 1px solid gainsboro;
}

.top ul{
    margin-left: 100px;
}
.top li{
    list-style: none;
    float: left;
    padding-left: 1vw;
}

.a-style{
    font-size: 1.5vw;
    text-decoration: none;
    color: black;
}

.a-style:hover{
    position: relative;
    top: 2px;
    right: 2px;
    color: cornflowerblue;
}

.dropdown {
    margin-top: 15px;
    margin-left: 3vw;
    position: relative;
    display: inline-block;
  }
  .dropdown-content {
    display: none;
    position: absolute;
    background-color: #f9f9f9;
    box-shadow: 0px 8px 16px 0px rgba(0,0,0,0.2);
    padding: 12px 16px;
  }
  .dropdown:hover .dropdown-content {
    display: block;
  }

  .dropdown-content a {
    color: black;
    padding: 12px 16px;
    text-decoration: none;
    display: block;
}
/* 鼠标移上去后修改下拉菜单链接颜色 */
.dropdown-content a:hover {background-color: #f1f1f1}

/* 在鼠标移上去后显示下拉菜单 */
.dropdown:hover .dropdown-content {
    display: block;
}

@media screen and (max-width: 375px) { /*当屏幕尺寸小于600px时，应用下面的CSS样式*/
    .a-style {
        font-size: 5vw;
    }
  }